Where can I find a chart full of diagrams with different exercises u can do on a 3 station gym

I don't have the full diagram, but I can show you the major exercises you can do on your 3 station home gym one by one.

Firstly, you have to know what body parts you will work on:

Trapezius

Deltoid

Chest

Back

Biceps

Triceps

Legs

Calves

Abs

Secondly, you have to understand different parts of your home gym:

press

pec deck

leg press

high pulley

low pulley

leg ext./curl

ab crunch

VKR

Lastly, the movements with gif animation and pdf file:

(1) Gif

Cable shrug - http://www.exrx.net/weightexercises/trap...

Lever shrug - http://www.exrx.net/weightexercises/trap...

Cable upright row - http://www.exrx.net/weightexercises/delt...

Lever shoulder press - http://www.exrx.net/weightexercises/delt...

Lever chest press - http://www.exrx.net/weightexercises/pect...

Lever pecdeck flye - http://www.exrx.net/weightexercises/pect...

Cable pulldown - http://www.exrx.net/weightexercises/lati...

Cable row - http://www.exrx.net/weightexercises/back...

Cable curl - http://www.exrx.net/weightexercises/bice...

Cable pushdown - http://www.exrx.net/weightexercises/tric...

Arm dip (on VKR) - http://www.exrx.net/weightexercises/tric...

Leg press - http://www.exrx.net/weightexercises/quad...

Leg extension - http://www.exrx.net/weightexercises/quad...